Years ago when I was guiding I was out touring a property with the outfitter I worked for. We were placing trail cams and blinds for future hunts. Along comes a side by side with a guy driving that I can only describe as being build like a tank. His young son was in the passenger seat. He proceeded to tear us a new one for several minutes, not letting the outfitter, who is very well mannered get a word in edgewise. Eventually the guy got so worked up he was sweating, beet red, and honestly I think he was about to tear the outfitter out of the drivers seat and assault him.
In ten plus years of knowing the outfitter, it was the only time I've ever heard him so much as raise his voice to another person. He finally bellered, who are you? I've got this property leased for hunting and I know you aren't the owner. We had done everything right, knew exactly where we were at all times and had even given the landowner a complimentary heads us that we would be out that day well in advance.
Turned out it was the landowners brother and nephew. The guy never even apologized either, he just said, Oh, I thought you guys were trespassing. Frankly, we were all lucky that that situation didn't escalate further and end up turning violent.
In another fun encounter, I killed my first antelope on BLM land and was accused of trespassing. Once we established we were on BLM (paper map days) he still thought I must have accessed it through his property. I guess the guy just thought there was no way I would've accessed the public the way that I had, which was legal. Again, no apology.
I say all that to say that I would probably not be very forgiving if this ever happens again unless it were an honest mistake or simple misunderstanding. If a person is curious about what I'm doing and wants to treat me in a decent manner when they come talk to me, I have no problem with that. Unfortunately it seems like a lot of the time landowners get away with something over and over again before they even get so much as a warning not to do it.
My past experience with landowners made me very leery about dealing with the rancher where we bought our property. Thankfully, those concerns were completely unnecessary and so far our relationship has been like the good ol days. We can shoot cow elk on their place and have helped with road projects just to build a good relationship. I wish it were always like that.